No, you only ever need 1 cargo module. Ever looked at your cargo modules on ships flying home from a mission? I saw one with 1000/50 at one time after a really big fight in the alien dimension.
Like their ancestors in UFO, your people are excelent pack-rats!
As for your base layouts - don't scrap the base. Just decentralise some of your facilities to make the base smaller.
Tips:
1. Only 1 base in the entire city needs a repair bay. This should be the one where you send all your ships. This is the only other module besides the grav-lift where enemies can come in. So build this at the edge of the base (any) and fit a couple of defence modules next to it.
2. Engineering workshops can be in any base in the city - so this is a great module to move to another base (or several if you use multiple large workshops).
3. Both the larger Bio and Quantum labs are also good modules to spread out to other bases. However, while I often advocate keeping the research facilities at the same base where you collect all your research samples, it is still possible. It just means remember to drop off the goods and aliens at the right base. Your call though.
4. Training facilities. If the base is staffed with androids only - don't build any of the training labs. If there are only humans, just build the combat lab. If there are hybrids, build the psi-lab for their initial psi-training. But if you
5. Empty corridors are actually great. Why? No scientists get created there. So separate the lift from the rest of the base with defence modules and empty corridors.
6. If you're willing to risk it. Only build 1 general stores. You can store much more than the stores can hold - but only if you bring the goods in manually by plane (loot - or manually dropping the equipment off from the agent/vehicle equip screen). This will prevent you from transfering to this base or buying new equipment but it means a lot less modules built. Unless, of course, you're willing to really keep this base lean and mean by keeping your inventory to the absolute minimum.
7. If you have multiple research bases (I highly advise against it - but it's still your call), do note that a small research facility can continue to research a project started at another base. They will even be able to research topics that can only be started in the large labs. So if you're strapped for space - go for it and use small research facilities to aid the larger facilities.
8. When buying new bases - don't go for the base with the biggest corridor layout. The best bases are actually the smaller ones with good defensive layouts (oh, and built underneath Warehouses - which can last more hits than any slum complex can). One great base layout example is the one with the corridors shaped like an 8, with the lift right in the centre. If you don't build a repair bay here, four defense modules of any type will seal up this base for good. Another good example, for a base specialising in manufacture or research would be the + or C shaped corridor layout. You can seal the base off very well with a cluster of defence modules and fit two large research/manufacture facilities in here as well and still have plenty of space to cram in stores, quarters and a med-bay.
Etcetera, etcetera.
- NKF